The Implementation of an Analog Wavelet Transform Chip Through Hybrid of Analog and Digital Circuit
Hao Jun-zhe · Electronic Components and Materials · 2004
The total circuit is implemented by standard CMOS technology and module designed;the digital frequency generator and analog filter was designed respectively. The digital frequency generator was implemented by the way of direct digital synthesis(DDS),generating 5 different center frequency (10 channels), simplifying the conventional designation of VCO, improving the flexible of frequency generator. According to the need of precision, 5 cascaded low pass filter approaching the analog Gaussian low pass filter. This paper describe and discuss a way to implement an analog wavelet transform chip, which perform one-dimensional input, through hybrid of a integrated analog and digital circuit.